The Compaq Presario 2100 laptop, released in 2004, includes a feature that allows you to connect to a wireless network within range. Once you turn on Wi-Fi, your laptop searches for the available networks and prompts you to connect to them.
Locate the wireless "ON/Off" button on your Compaq Presario 2100 laptop. It is located just below and to the right of the touch pad. A wireless indicator light is next to this button.
Press the wireless "ON/Off" button to turn on Wi-Fi. The indicator light turns on.
Right-click the wireless connection icon on the system tray on your computer's taskbar. Click "View Available Wireless Networks" from the menu that pops up. A list of the wireless networks within range pops up.
Select the wireless network you want to connect to. Click "Connect."